▎ 摘　　要

NOVELTY - Graphene-phase change material structure comprises a phase change material layer (101). A graphene layer (102) is arranged on the top or bottom of the phase change material layer. USE - Graphene-phase change material structure. ADVANTAGE - The graphene-phase change material structure is not easy to diffuse and has good thermal stability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for preparing graphene-phase change material structure which involves preparing a phase change material layer; preparing a graphene layer on the surface of the phase change material layer; (2) a memory unit, which comprises a first electrode layer, a second electrode layer and the graphene-phase change material structure, the graphene-phase change material structure layer is located on top of the first electrode layer, the second electrode layer is located on the top of the graphene-phase change material structure; and (3) a method for preparing a memory cell, which involves preparing a first electrode layer; preparing a graphene-phase change material structure layer on the top surface of the first electrode layer; preparing a second electrode layer on the surface of the graphene-phase change material structure layer. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an graphene-phase change material structure. Phase change material layer (101) Graphene layer (102)